The Loose Change "documentary" claims at around 1:02:45 into the film that Osama Bin Laden immediately denied involvement in the attacks.
"The U.S. government has consistently blamed me for being behind every [attack]. I would like to assure the world that I did not plan the recent attacks, which seems to have been planned by people for personal reasons. I have been living in the Islamic emirate of Afghanistan and following its leaders' rules. The current leader does not allow me to exercise such operations."
-Osama bin Laden, from a statement issued to Al Jazeera within days of the 9-11 attacks.
Did Osama Bin Laden deny involvement in the 9/11 attacks?